Disinfection of Orthodontic Elastomers and Its Effects on Tensile Strength.

IF 0.8 Q4 DENTISTRY, ORAL SURGERY & MEDICINE Turkish Journal of Orthodontics Pub Date : 2022-03-01 DOI:10.5152/turkjorthod.2022.20151
Leandro Berni Osorio, Luiz Makito Osawa Gutierrez, Eduardo Martinelli de Lima, E. Gonçalves Mota, Luciane Macedo de Menezes
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Abstract

OBJECTIVE This study aimed to investigate the effect of different disinfection protocols on the mechanical properties of orthodontic elastomeric ligatures (EL), an important issue to biosafety improvement and infection control, and to avoid cross-contamination. METHODS A total of 120 EL were randomly divided into 6 experimental groups (n = 20) according to the disinfection method employed: group 1, EL were not immersed in a disinfectant solution (control group); group 2, EL were immersed in 2% glutaraldehyde; group 3, EL were immersed in 70% alcohol solution; group 4, EL were cleaned in an ultrasound washing (UW) machine by immersion in 0.5% enzyme detergent solution; group 5, UW procedure was performed, followed by immersion in 2% glutaraldehyde; Group 6, UW procedure was performed, followed by immersion in 70% alcohol. After disinfection, EL were subjected to a tensile strength test where the maximum strength, maximum elongation, and work at failure were determined. Data were statistically evaluated using one-way ANOVA and Dunnett's t-test for multiple comparisons. RESULTS Statistically significant different (P < .05) values were found between the disinfection methods, and 70% alcohol showed negative changes in all mechanical properties of orthodontic elastomers. By contrast, 2% glutaraldehyde did not show significant alteration in mechanical properties, whereas the UW procedure showed significant alteration in maximum strength and work at failure. CONCLUSION Of the tested substances for disinfection, 2% glutaraldehyde was the only substance that did not cause significant changes in the mechanical properties of orthodontic elastics and is considered as an alternative for elastic disinfection before its use.
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正畸弹性体消毒及其对拉伸强度的影响。
目的探讨不同消毒方案对正畸弹性结扎材料力学性能的影响,这是提高正畸弹性结扎材料生物安全性和控制感染的重要问题,同时也是避免交叉污染的重要手段。方法将120只EL按消毒方法随机分为6个实验组(n = 20): 1组EL不浸泡于消毒液中(对照组);2组,EL浸泡在2%戊二醛中;第三组,EL浸泡在70%酒精溶液中;第4组,EL在超声清洗机中浸泡0.5%酶洗涤液清洗;第5组,UW程序,然后浸泡在2%戊二醛中;第6组,UW程序,然后浸泡在70%酒精中。消毒后,对EL进行拉伸强度试验,测定其最大强度、最大伸长率和失效功。数据采用单因素方差分析和Dunnett’st检验进行统计分析。结果不同消毒方法对正畸弹性体力学性能的影响差异有统计学意义(P < 0.05), 70%酒精对正畸弹性体力学性能的影响均为负。相比之下,2%戊二醛在力学性能上没有明显的变化,而UW处理在最大强度和失效时的功方面有明显的变化。结论在检测的消毒物质中,2%戊二醛是唯一对正畸弹性材料力学性能无明显影响的物质,可作为弹性材料使用前消毒的替代物质。
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来源期刊
Turkish Journal of Orthodontics
Turkish Journal of Orthodontics Dentistry-Orthodontics
CiteScore
2.10
自引率
9.10%
发文量
34
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